So 2 billion, 4 billion -- these are big numbers, but there's a lot of "billions of things" in the world, right?
所以20亿,40亿--这都是很大的数值,但是世界上有很多“数十亿的东西“,对不?
Remember, we saw that last time looking at the binary numbers. 2 to the n is a big number.
还记得吗,我们上次看过的二进制数,从2到n是一个很大的数。
This is 2 to the 64, and that's a pretty big number.
这是2的64次方,是相当大的数字了。
If n is something like 50, not a big number, 2 to the 50 is a huge number.
如果n是50,50不是一个大数,但2的50次方就是一个巨大的数。
Ok, just fine, 2 it's no big deal.
我们定义这个点的半径为,然后角度pi是。
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